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Current-induced forces in conducting and semiconducting carbon nanotubes

Y Girard, T Yamamoto and K Watanabe

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The forces induced by a steady electric current on several atoms, viz., B, C, N, O and F, adsorbed on metallic (5,5) and semiconducting (8,0) carbon nanotubes are calculated using the Non-Equilibrium Green's Function technique combined with density functional theory. We estimate how the current-induced forces will move the atoms along the tubes and we explain these results in terms of charge transfer, modification of the electron density, and chemical bonding properties of the scattering states.


PACS

68.43.Mn Adsorption kinetics

68.47.Fg Semiconductor surfaces

61.46.Fg Nanotubes

73.20.At Surface states, band structure, electron density of states

68.47.De Metallic surfaces

71.15.Mb Density functional theory, local density approximation, gradient and other corrections

Subjects

Condensed matter: electrical, magnetic and optical

Semiconductors

Surfaces, interfaces and thin films

Nanoscale science and low-D systems

Dates

Issue 5 (2008)



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